Variable-speed feeding mechanism



Jani 16 1923.

' A. ROSENBERG.

VARIABLE SPEED FEEDING MECHANISM.

FlLED DEC. 19, 1921.

Patented Jan. 16, 1923.

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, 1 ,442,23e T T,

ARTHUR ROSENBERG, or'NEw YORK, 1v. Y., ASSIGHOB r memes. wonrigjor BROOKLYN, NEW YORK, MAXMAYER nn ARTHUR ROSENBERG, Born on New YORK, N. YQ, TRUSTEES. r

VARIABLE-SPEED rnnniive MECHANISM.

Application filed beceinber 19.1921; Serial No. 523,535. I

This. invention relates to improvements in feedingmechanism in which a bar or rod is moved longitudinally at variable speed.

It is the object of this invention to provide'a simple feeding device which may be operated by hand or by automatic means to feed a bar longitudinally at instantly variable speed.v

It is another object of the invention to provide means for reversing the direction of feeding instantly and for varying the speed of feeding instantly in eitherdirection. It is another object of this invention to provide means for feeding a rotating cylinder forward or backward at varying speed, without reversing the direction of rotation oitgaid cylinder.

Further objects will appear from the de-. tailed description.

The invention consists ina novel combination of parts and detailsof construction. hereinafter fully described and illustrated in the accompanying drawings and finally pointed out in the claims. 1

In the drawings which these specifications I Fig. I is a front elevation of thevariable speed feeding mechanism. Frame 23 is shown in section on the line II ofFig.

. II. Solenoid 37 is omitted for clearness; 40 FighII is a plan view of the mechanism from which top plate 15 is removed; show-.-

ing frame 23 in section on line IIL-IIIof Fi IV.

Fig. I. p

Fig. 111 is a vertical side elevation on the line ill- 1H of Fig. 1.:

Fig. IV is" a front elevation showingthe principal part of a modification of thesaine device; The lower part is shown in section on line IV-IV of Fig. V.

Fig. IV. 1

Fig. V1 is a diagrammatic front elevation showing a detail of the device arranged for pemt enbre en r fi galseve n -.;5;

form a part of Fig. V is a plan view ontheline v v of Similar characters 3 of reference indicatei corresponding parts throughoutthe various R fe l ifl11g to. Fig. of th'e drawingsl represents an electric motor suitablyqmount,

edonbase plate 2 and adapted to rotate pulit ley3-provided with cogs tum'formly spaced on ts cylmdricalisurface and engaging apertures 50f a steel belt16 which drives a 'sim ilar. pulley .7 held m n elongated pinion 3 i which is ro tatablyrmounted onpivgits 9 in -6 5' bearings 10. and lll .Two 1side'p1ates l3 and Hare supported on base 2' and hold ai -top plat/e15. Two horizontal bars .16 are held by plates "13 .and 14,. they form guides for a: ournal. hanger 17, in which-a hollow cylin- 7O der 18:.is rotatably mounted. Q-O n one side 1 of the. .journ a1 18 this cylindercarries gearv 19 whlch-mesheswith the elongated pinion 8, while the other end of cylinder 18. is formed into spring chuck 20;,rf cylindricalbar '21.

is held spring chuck 20 andguided to slide in an aperture 22015 plate '13. (A rec'- tangular frame 23 which surroundsbar 21 1s arranged near plate.13;to.oscillate about the vertical axisiformed bypivots Qand 25 held in bearings 26 and 27. A- forked lever 28, pivoted to oscillate vertically on frame 23 supportsa giiide wheel 30jpreferablyprovided with a knifeedge on'its circumference. The edge of wheel 30 is .held incontact with bar 2l by means or spring 31, suitably. fastened to frame 23 andwby' arm. 34 to lever28l' Rod-21 rests ona rotatable cylinder 29, pivoted in frame 23. The free end-of arm. 34; 1is connected by means or" a forked connecting rod 35 to arn1-. ature 36 which forms-gthe core of solenoid 37. A spring 38 attached to fplate lt' and armature 36 tends'to'pull the latter towards this plate. 2 i f Afmodification' ofthis device is shown in fnthis arrangement theirod 2lis provided" I with an extension lO of squarecross-section which is slidably held in an aperture 22 of plate 13. An-axialpivot llprovides a journal ior rod121 and the pivot end o'f'a screw.

' 42 hel d in b'ar 21 may. rotateina circular recess ch41. p A In Fig. IV helower .pivot for frame 23" is, extended by -'me ans 'ofx-rod l3lthrou'gh plate39 and its bearing held on base plate Bland an armature 44, havingthe' form of a cylinder provided'with two parallel sides, is fastened to axis 43. This armature is oscillatably arranged in the magnetic field of ahorseshoe electro-magnet 15 as shown in Fig. V. Two fiat springs 46 held on plate 39 bear lightly against the flat sides of frame 23 to hold the same normal to rod 21.

A further modification of the mechanism is diagrammatically shown in Fig. VI. In this case a bell crank 50, pivoted on a pin 51 to swing in a vertical plane is connected by means of a pin 52 and eye 53 to frame 23 of the device illustrated in Figs. I, II,

III. The eye 53 forms the end of a ver-' tical'rod 54: which mayslide and rotate in sleeve 55 of crank '50. The horizontal 'arm of crank 50 is forked to embrace collar 56 of a centrifugal governor 60; two pins 57 held by this fork slide in a grooveof this collar. A pulley 61 held on central rod 62 of governor 60'is adapted to receive motion from any suitable source ofpower by means of a'belt and to rotate the governor thereby.

This device is intended to move the cylindrical bar 21 or in Fig. IV thesquare bar 40, longitudinally forward or backward at a variable rate of speed. This speed may be varied by hand,,by variations of an electric current, or by automatic mechanical means. This is accomplished in the following manner:

The pinion 8 is rotated by means of pulleys 3 and 7 and belt 1 at a constant speed from motor 1. This rotary motion is trans mitted to bar 21 by means of gear 19. Guidewheel 30 will inscribe a circle on bar 21 when frame 23 stands perpendicular to rod 21, and this bar will simply rotate without any longitudinal motion. Should however frame 23 be turned on its axis and guide-wheel 3O assume an angular position to rod 21, then this wheel will inscribe a helix upon rod 21 and propel the rod forward if the rotation is in the direction of the arrow at and frame 23 is swung in an angular direction towards a-m The rod will move backward if the angular direction of the frame 23 and wheel 30 is towards bb.

The speed with which, the rod.2l is pro-.

p'elled varies as the tangent of the angle formed by the guide wheel 30 and the axis of rod 21. This variation can be effected by turning frame 23 by hand, by automatic V show aconstruction in which this angular movement is produced by an oscillatable armature 44 held on axis as, which simplifies the mechanical construction of the device.

Fig. I On account of its simplicity and sensitiveness it is advantageously used for varying the rate of operation of an iris diaphragm shutter on moving picture cameras to open or cover the same fraction of lens area during equal time intervals.

The electric current passing through solenoid 37 or magnet 45 can be varied by re-- mote control and thereby the speed of rod 21; but it is evident that the rod 21 itself can be made the controlling agent for this current. This is illustrated in a separate application for Letters Patent for an electric arc lamp, in which this device is used as a feeding mechanism for the carbon electrodes.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: 1. In a device ofthe kind. described, a cylinder, means to rotate said cylinder on its axis, means to describe a helix upon the surface of said cylinder to move the same longitudinally and magnetic means to vary the pitch of said helix during the rotation.

2. In a device of the kind described, :1 cylinder, means to rotate said cylinder on its axis, means to inscribe a helix on said cylinder and electrically operated means to-vary the angle of said helix during the rotation to move said cylinder longitudinally at varying speed.

3. In a device of the kind described a cylinder, means to rotate said cylinder on its axis, means describing a helix upon the surface of said cylinder to move the same longidinally during its rotation and to reverse the longitudinal movement of said cylinder during its rotation in the same direction and automatic means to control the movements of said cylinder.

4. In a device of the kind described, a cylinder, means to rotate said cylinder on its axis, means describing a helix upon the surface of said cylinder to move the same lon itudinally, and automatic means to vary t e angle of said helix and the speed of longitudinal movement of said cylinder.

5. In a device of the kind described, a cylinder, means to rotate said cylinder on its axis, means inscribing a helix upon said cylinder to move the same longitudinally during its rotation, said inscribing means being adapted to vary the speed of said longitudinal movement and remotely power controlled means to operate said inscribing means.

6. In a device of the kind described, the

combination with a rotatable cylinder and a disk to inscribe a helix of variable angularity thereon during its rotation, of a bar in coaxial alinement with said cylinder and means to prevent rotation of said bar, said cylinder and said disk forming means to move said bar longitudinally at variable speed.

7. In a device of the kind described, a cylinder, means to rotate said cylinder on its axis, a guide plate angularly disposed to said axis in frictional engagement with said cylinder, and automatic means to vary the angular position of said guide plate to describe a helix of varying pitch upon said cylinder to move said cylinder longitudinally at varying speed.

8. In a device of the kind described, a cylinder, means to rotate said cylinder on its axis, an oscillatable frame surrounding said cylinder, a guide plate held by said frame in frictional engagement with said cylinder, power operated means to oscillate said frame and said guide plate to describe a helix upon said cylinder during its rotation, forming automatic means to move said cylinder longitudinally in alternate direction while rotating in the same direction.

9. In a device of the kind described, a cylinder, means to rotate said cylinder on its axis, a disk in frictional engagement with said cylinder on an axis normally parallel to that of said cylinder to describe a circle upon the cylindrical surface power operated, means to vary the inclination of said disk axis to describe a helix upon said'cylinder during its rotation and forming automatic means to produce and to control longitudinal movement of said cylinder.

10. In a device of the kind described, a cylinder, means to rotate said cylinder on its axis, a disk in frictional engagement with said cylinder to be rotated thereby upon an axis normally parallel to the cylinder axis,

means to oscillate said disk on an axis per pendicular to the axis of rotation and remotely power controlled means to produce 7 said oscillation.

11. In a device of the kind described, the combination with a rotating cylinder and means inscribing a helix of variable pitch thereon to move said cylinder longitudinally at variable speed, of a journal moved by said cylinder and forming a support for the same.

12. In a device of the kind described, the combination with a rotating cylinder and means to describe a helix of variable angularity thereon to move said cylinder longitudinally at variable speed, of. a travelling support moved by said cylinder and means to rotate said cylinder held by said support.

13. In a device'of the kind described the combination with a rotating cylinder and a disk describing a helix of variable angle thereon during the rotation to vary the speed of longitudinal movement, of asupport for said cyllnder'moved by'the same and rotatable clamping means to hold said cylinder on said support. 1

14:. In a device of the kind described a cylinder, means to rotate said cylinder on its axis, an oscillatable frame surrounding said cylinder, means held by said frame to inframe.

ARTHUR ROSENBERG; 

